Abstract: A safety valve including a brass valve body having a through bore provided with a circular sharp-edged valve seat and another sharp edge. A valve stem carrying a ball valve and a biasing spring disposed in the through bore. A cap member screwed through onto the brass valve body and causing the ball valve to be seated on the sharp-edged valve seat and causing the ball valve to be positioned in close proximity to the other sharp edge. A plurality of radially vent holes formed in the brass valve body for venting fluid pressure to atmosphere when the ball valve becomes unseated from the sharp-edged valve seat. A lock nut for locking the cap member in position and a spring pin carried by the valve stem to permit the ball valve to be manually opened.

Abstract: A pneumatically actuated drain valve device for venting the moisture in an air dryer to atompshere including a rolling diaphragm for linearly moving a piston stem assembly to unseat a spring and pressure biased stainless steel ball valve from its conically shaped valve seat to permit the collected moisture in an accumulation chamber to pass through a sintered exhaust muffler to the atmosphere.

Abstract: A fluid governor including an electric motor for driving a fluid compressor and causing a build-up of pressure in a storage reservoir, pressure switch responsive to the pressure in the storage reservoir, electromagnetic solenoid valve connected to the pressure switch, a pneumatically operated electrical contact controller pneumatically connected to the magnetic solenoid valve for causing the pneumatically operated electrical contact controller to be connected to the storage reservoir when the pressure in the storage reservoir exceeds a first predetermined value to deenergize the electric motor and for causing the pneumatically operated electrical contact controller to be connected to atmosphere when the pressure in the storage reservoir drops to a second predetermined value to energize the electric motor.